changed rear caliper today so bonnet was up for access to brake fluid res but it started raining so i put my hood up to get job done not thinking about cover free fusebox Soooo went out to get in car & fuse box buzzing car not starting apart from stripdown & HOT air gun & wd-40 should i use electrical contact cleaner instead? not happy about using electric hot air gun outside in the rain either need car for 0600 journey to work in my second week of new job